55891777 has 4 divisors (see below), whose sum is σ = 55908036. Its totient is φ = 55875520.

The previous prime is 55891751. The next prime is 55891783. The reversal of 55891777 is 77719855.

55891777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12845056 + 43046721 = 3584^2 + 6561^2 .

It is a cyclic number.

It is not a de Polignac number, because 55891777 - 2¹⁹ = 55367489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55891777.

It is not an unprimeable number, because it can be changed into a prime (55891747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (13977009).

Almost surely, 2^55891777 is an apocalyptic number.

It is an amenable number.

55891777 is a deficient number, since it is larger than the sum of its proper divisors (16259).

55891777 is a wasteful number, since it uses less digits than its factorization.

55891777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16258.

The product of its digits is 617400, while the sum is 49.

The square root of 55891777 is about 7476.0803232710. The cubic root of 55891777 is about 382.3396214880.

The spelling of 55891777 in words is "fifty-five million, eight hundred ninety-one thousand, seven hundred seventy-seven".